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Diffstat (limited to 'third_party/nix/src/libstore/local-store.hh')
| -rw-r--r-- | third_party/nix/src/libstore/local-store.hh | 319 |
1 files changed, 0 insertions, 319 deletions
diff --git a/third_party/nix/src/libstore/local-store.hh b/third_party/nix/src/libstore/local-store.hh deleted file mode 100644 index a7c49079d2..0000000000 --- a/third_party/nix/src/libstore/local-store.hh +++ /dev/null @@ -1,319 +0,0 @@ -#pragma once - -#include <chrono> -#include <future> -#include <string> -#include <unordered_set> - -#include <absl/status/status.h> -#include <absl/strings/str_split.h> - -#include "libstore/pathlocks.hh" -#include "libstore/sqlite.hh" -#include "libstore/store-api.hh" -#include "libutil/sync.hh" -#include "libutil/util.hh" - -namespace nix { - -/* Nix store and database schema version. Version 1 (or 0) was Nix <= - 0.7. Version 2 was Nix 0.8 and 0.9. Version 3 is Nix 0.10. - Version 4 is Nix 0.11. Version 5 is Nix 0.12-0.16. Version 6 is - Nix 1.0. Version 7 is Nix 1.3. Version 10 is 2.0. */ -const int nixSchemaVersion = 10; - -struct Derivation; - -struct OptimiseStats { - unsigned long filesLinked = 0; - unsigned long long bytesFreed = 0; - unsigned long long blocksFreed = 0; -}; - -class LocalStore : public LocalFSStore { - private: - /* Lock file used for upgrading. */ - AutoCloseFD globalLock; - - struct State { - /* The SQLite database object. */ - SQLite db; - - /* Some precompiled SQLite statements. */ - SQLiteStmt stmtRegisterValidPath; - SQLiteStmt stmtUpdatePathInfo; - SQLiteStmt stmtAddReference; - SQLiteStmt stmtQueryPathInfo; - SQLiteStmt stmtQueryReferences; - SQLiteStmt stmtQueryReferrers; - SQLiteStmt stmtInvalidatePath; - SQLiteStmt stmtAddDerivationOutput; - SQLiteStmt stmtQueryValidDerivers; - SQLiteStmt stmtQueryDerivationOutputs; - SQLiteStmt stmtQueryPathFromHashPart; - SQLiteStmt stmtQueryValidPaths; - - /* The file to which we write our temporary roots. */ - AutoCloseFD fdTempRoots; - - /* The last time we checked whether to do an auto-GC, or an - auto-GC finished. */ - std::chrono::time_point<std::chrono::steady_clock> lastGCCheck; - - /* Whether auto-GC is running. If so, get gcFuture to wait for - the GC to finish. */ - bool gcRunning = false; - std::shared_future<void> gcFuture; - - /* How much disk space was available after the previous - auto-GC. If the current available disk space is below - minFree but not much below availAfterGC, then there is no - point in starting a new GC. */ - uint64_t availAfterGC = std::numeric_limits<uint64_t>::max(); - - std::unique_ptr<PublicKeys> publicKeys; - }; - - Sync<State, std::recursive_mutex> _state; - - public: - PathSetting realStoreDir_; - - const Path realStoreDir; - const Path dbDir; - const Path linksDir; - const Path reservedPath; - const Path schemaPath; - const Path trashDir; - const Path tempRootsDir; - const Path fnTempRoots; - - private: - Setting<bool> requireSigs{ - (Store*)this, settings.requireSigs, "require-sigs", - "whether store paths should have a trusted signature on import"}; - - const PublicKeys& getPublicKeys(); - - public: - // Hack for build-remote.cc. - // TODO(tazjin): remove this when we've got gRPC - PathSet locksHeld = - absl::StrSplit(getEnv("NIX_HELD_LOCKS").value_or(""), - absl::ByAnyChar(" \t\n\r"), absl::SkipEmpty()); - - /* Initialise the local store, upgrading the schema if - necessary. */ - LocalStore(const Params& params); - - ~LocalStore(); - - /* Implementations of abstract store API methods. */ - - std::string getUri() override; - - bool isValidPathUncached(const Path& path) override; - - PathSet queryValidPaths(const PathSet& paths, SubstituteFlag maybeSubstitute = - NoSubstitute) override; - - PathSet queryAllValidPaths() override; - - void queryPathInfoUncached( - const Path& path, - Callback<std::shared_ptr<ValidPathInfo>> callback) noexcept override; - - void queryReferrers(const Path& path, PathSet& referrers) override; - - PathSet queryValidDerivers(const Path& path) override; - - PathSet queryDerivationOutputs(const Path& path) override; - - StringSet queryDerivationOutputNames(const Path& path) override; - - Path queryPathFromHashPart(const std::string& hashPart) override; - - PathSet querySubstitutablePaths(const PathSet& paths) override; - - void querySubstitutablePathInfos(const PathSet& paths, - SubstitutablePathInfos& infos) override; - - void addToStore(const ValidPathInfo& info, Source& source, RepairFlag repair, - CheckSigsFlag checkSigs, - std::shared_ptr<FSAccessor> accessor) override; - - Path addToStore(const std::string& name, const Path& srcPath, bool recursive, - HashType hashAlgo, PathFilter& filter, - RepairFlag repair) override; - - /* Like addToStore(), but the contents of the path are contained - in `dump', which is either a NAR serialisation (if recursive == - true) or simply the contents of a regular file (if recursive == - false). */ - Path addToStoreFromDump(const std::string& dump, const std::string& name, - bool recursive = true, HashType hashAlgo = htSHA256, - RepairFlag repair = NoRepair); - - Path addTextToStore(const std::string& name, const std::string& s, - const PathSet& references, RepairFlag repair) override; - - absl::Status buildPaths(std::ostream& log_sink, const PathSet& paths, - BuildMode build_mode) override; - - BuildResult buildDerivation(std::ostream& log_sink, const Path& drvPath, - const BasicDerivation& drv, - BuildMode buildMode) override; - - void ensurePath(const Path& path) override; - - void addTempRoot(const Path& path) override; - - void addIndirectRoot(const Path& path) override; - - void syncWithGC() override; - - private: - typedef std::shared_ptr<AutoCloseFD> FDPtr; - using FDs = std::list<FDPtr>; - - void findTempRoots(FDs& fds, Roots& roots, bool censor); - - public: - Roots findRoots(bool censor) override; - - void collectGarbage(const GCOptions& options, GCResults& results) override; - - /* Optimise the disk space usage of the Nix store by hard-linking - files with the same contents. */ - void optimiseStore(OptimiseStats& stats); - - void optimiseStore() override; - - /* Optimise a single store path. */ - void optimisePath(const Path& path); - - bool verifyStore(bool checkContents, RepairFlag repair) override; - - /* Register the validity of a path, i.e., that `path' exists, that - the paths referenced by it exists, and in the case of an output - path of a derivation, that it has been produced by a successful - execution of the derivation (or something equivalent). Also - register the hash of the file system contents of the path. The - hash must be a SHA-256 hash. */ - void registerValidPath(const ValidPathInfo& info); - - void registerValidPaths(const ValidPathInfos& infos); - - unsigned int getProtocol() override; - - void vacuumDB(); - - /* Repair the contents of the given path by redownloading it using - a substituter (if available). */ - void repairPath(const Path& path); - - void addSignatures(const Path& storePath, const StringSet& sigs) override; - - /* If free disk space in /nix/store if below minFree, delete - garbage until it exceeds maxFree. */ - void autoGC(bool sync = true); - - private: - int getSchema(); - - void openDB(State& state, bool create); - - void makeStoreWritable(); - - static uint64_t queryValidPathId(State& state, const Path& path); - - uint64_t addValidPath(State& state, const ValidPathInfo& info, - bool checkOutputs = true); - - void invalidatePath(State& state, const Path& path); - - /* Delete a path from the Nix store. */ - void invalidatePathChecked(const Path& path); - - void verifyPath(const Path& path, const PathSet& store, PathSet& done, - PathSet& validPaths, RepairFlag repair, bool& errors); - - static void updatePathInfo(State& state, const ValidPathInfo& info); - - void upgradeStore6(); - void upgradeStore7(); - PathSet queryValidPathsOld(); - ValidPathInfo queryPathInfoOld(const Path& path); - - struct GCState; - - static void deleteGarbage(GCState& state, const Path& path); - - void tryToDelete(GCState& state, const Path& path); - - bool canReachRoot(GCState& state, PathSet& visited, const Path& path); - - void deletePathRecursive(GCState& state, const Path& path); - - static bool isActiveTempFile(const GCState& state, const Path& path, - const std::string& suffix); - - AutoCloseFD openGCLock(LockType lockType); - - void findRoots(const Path& path, unsigned char type, Roots& roots); - - void findRootsNoTemp(Roots& roots, bool censor); - - void findRuntimeRoots(Roots& roots, bool censor); - - void removeUnusedLinks(const GCState& state); - - Path createTempDirInStore(); - - void checkDerivationOutputs(const Path& drvPath, const Derivation& drv); - - using InodeHash = std::unordered_set<ino_t>; - - InodeHash loadInodeHash(); - static Strings readDirectoryIgnoringInodes(const Path& path, - const InodeHash& inodeHash); - void optimisePath_(OptimiseStats& stats, const Path& path, - InodeHash& inodeHash); - - // Internal versions that are not wrapped in retry_sqlite. - static bool isValidPath_(State& state, const Path& path); - static void queryReferrers(State& state, const Path& path, - PathSet& referrers); - - /* Add signatures to a ValidPathInfo using the secret keys - specified by the ‘secret-key-files’ option. */ - static void signPathInfo(ValidPathInfo& info); - - Path getRealStoreDir() override { return realStoreDir; } - - void createUser(const std::string& userName, uid_t userId) override; - - friend class DerivationGoal; - friend class SubstitutionGoal; -}; - -using Inode = std::pair<dev_t, ino_t>; -using InodesSeen = std::set<Inode>; - -/* "Fix", or canonicalise, the meta-data of the files in a store path - after it has been built. In particular: - - the last modification date on each file is set to 1 (i.e., - 00:00:01 1/1/1970 UTC) - - the permissions are set of 444 or 555 (i.e., read-only with or - without execute permission; setuid bits etc. are cleared) - - the owner and group are set to the Nix user and group, if we're - running as root. */ -void canonicalisePathMetaData(const Path& path, uid_t fromUid, - InodesSeen& inodesSeen); -void canonicalisePathMetaData(const Path& path, uid_t fromUid); - -void canonicaliseTimestampAndPermissions(const Path& path); - -MakeError(PathInUse, Error); - -} // namespace nix |